<template>
  <div class="article-container">
    <!-- 导航栏 -->
    <van-nav-bar
      class="page-nav-bar"
      left-arrow
      left-text="返回"
      title="黑马头条"
      @click-left="$router.push('/home')"
    ></van-nav-bar>
    <!-- /导航栏 -->

    <div class="main-wrap">
      <!-- 加载中 -->
      <div class="loading-wrap" v-if="loadingShow">
        <van-loading color="#3296fa" vertical>加载中</van-loading>
      </div>
      <!-- /加载中 -->

      <!-- /加载完成-文章详情 -->
      <!-- 加载完成-文章详情 -->
      <div
        class="article-detail markdown-body"
        v-if="articleContent.title"
        ref="divcontent"
      >
        <!-- 文章标题 -->
        <h1 class="article-title">{{ articleContent.title }}</h1>
        <!-- /文章标题 -->

        <!-- 用户信息 -->
        <van-cell class="user-info" center :border="false">
          <van-image
            class="avatar"
            slot="icon"
            round
            fit="cover"
            :src="articleContent.aut_photo"
          />
          <div slot="title" class="user-name">
            {{ articleContent.aut_name }}
          </div>
          <div slot="label" class="publish-date">
            {{ articleContent.pubdate }}
          </div>
          <!-- <followCom
            :isFollowed="articleContent.is_followed"
            :autId="articleContent.aut_id"
            @isFollowFn="articleContent.is_followed = $event"
            v-model="articleContent.is_followed"
          ></followCom> -->
          <followCom
            :autId="articleContent.aut_id"
            v-model="articleContent.is_followed"
          ></followCom>
        </van-cell>
        <!-- /用户信息 -->

        <!-- 文章内容 -->
        <div class="article-content" v-html="articleContent.content"></div>
        <van-divider>正文结束</van-divider>
        <commentList
          :artId="articleContent.art_id"
          @totalCountFn="totalCountFn"
          :newCommentObj="newCommentObj"
          @replyFn="replyFn"
          type="a"
        ></commentList>
      </div>
      <!-- 加载失败：404 -->
      <div class="error-wrap" v-else-if="statusShow">
        <van-icon name="failure" />
        <p class="text">该资源不存在或已删除！</p>
      </div>
      <!-- /加载失败：404 -->

      <!-- 加载失败：其它未知错误（例如网络原因或服务端异常） -->
      <div class="error-wrap" v-else>
        <van-icon name="failure" />
        <p class="text">内容加载失败！</p>
        <van-button class="retry-btn" @click="retryFn">点击重试</van-button>
      </div>
      <!-- /加载失败：其它未知错误（例如网络原因或服务端异常） -->
    </div>

    <!-- 底部区域 -->
    <div class="article-bottom">
      <van-button
        @click="showPopup"
        class="comment-btn"
        type="default"
        round
        size="small"
        >写评论</van-button
      >
      <van-icon name="comment-o" :info="totalCount" color="#777" />
      <!-- <van-icon color="#777" name="star-o" /> -->
      <collectedCom
        v-model="articleContent.is_collected"
        :artId="articleContent.aut_id"
      ></collectedCom>
      <!-- <van-icon color="#777" name="good-job-o" /> -->
      <likeingCom
        v-model="articleContent.attitude"
        :artId="articleContent.art_id"
      ></likeingCom>
      <van-icon name="share" color="#777777"></van-icon>
    </div>
    <!-- /底部区域 -->
    <!-- 发表弹层 -->

    <van-popup v-model="show" position="bottom">
      <commentPost
        :artId="articleContent.art_id"
        @closepopup="show = false"
        @newpl="newpl"
      ></commentPost>
    </van-popup>
    <!-- 评论回复弹层 -->
    <van-popup v-model="replyShow" position="bottom" style="height: 100%">
      <commentReply
        v-if="replyShow"
        :topCommentItem="topCommentItem"
        @closepopup="replyShow = false"
      ></commentReply>
    </van-popup>
  </div>
</template>

<script>
import { articleListApi } from "@/api/article";
import followCom from "@/components/followCom.vue";
import { ImagePreview } from "vant";
import collectedCom from "@/components/collectedCom.vue";
import likeingCom from "@/components/likeingCom.vue";
import commentList from "./component/commentList.vue";
import commentPost from "./component/commentPost.vue";
import commentReply from "./component/commentReply.vue";
export default {
  name: "ArticleIndex",
  components: {
    followCom,
    collectedCom,
    likeingCom,
    commentList,
    commentPost,
    commentReply,
  },
  props: {
    articleId: {
      type: [Number, String],
      required: true, //必传参数
    },
  },
  data() {
    return {
      loadingShow: false,
      articleContent: {}, //存储文章数据
      statusShow: false,
      following: false, //按钮是否开启loading加载
      totalCount: "",
      show: false,
      newCommentObj: {},
      replyShow: false,
      topCommentItem: {}, //层主的评论
    };
  },
  computed: {},
  watch: {},
  created() {
    this.$store.commit("setArticleId", this.articleId);
    this.retryFn();
  },

  mounted() {},
  methods: {
    async retryFn() {
      try {
        this.loadingShow = true;
        let { data } = await articleListApi(this.articleId);
        this.articleContent = data.data;
        //   //通过ref 获取到 divcontent 的dom
        //   let divdom = this.$refs.divcontent;
        //   //再通过quersll 获取到 dom 的图片
        //   let imglist = divdom.querySelectorAll("img");
        //但是目前获取不到 因为 vue dom 的更新是异步的 通过 nextick 进行 异步同步
        // console.log(imglist);
        this.$nextTick(() => {
          //通过ref 获取到 divcontent 的dom
          let divdom = this.$refs.divcontent;
          //再通过quersll 获取到 dom 的图片
          let imglist = divdom.querySelectorAll("img");
          //设置一个空数组来存储图片地址
          let arr = [];
          //遍历得到的所有图片的位数组 item 代表元素 index 元素的索引
          imglist.forEach((item, index) => {
            //插入到 准备好的数组中
            arr.push(item.src);
            //每一个图片添加一个点击事件
            item.onclick = function () {
              //调用图片预览的方法 vant 组件库一

              ImagePreview({
                images: arr, //需要预览的图片的url 数组
                startPosition: index, //图片预览起始位置索引
              });
            };
          });
        });
        this.loadingShow = false;
      } catch (error) {
        this.loadingShow = false;
        if (error.response.status == 404) {
          this.statusShow = true;
        }

        console.log(error);
      }
    },
    totalCountFn(v) {
      this.totalCount = v;
    },
    showPopup() {
      this.show = true;
    },
    //发表评论之后添加新的的评论
    newpl(obj) {
      this.newCommentObj = obj;
    },
    replyFn(item) {
      this.replyShow = true;
      this.topCommentItem = item;
    },
  },
};
</script>

<style scoped lang="less">
@import "./github-markdown.css";
.article-container {
  /deep/ .page-nav-bar {
    .van-icon {
      color: #fff;
    }
  }
  /deep/.van-nav-bar__text {
    color: #fff;
  }
  .main-wrap {
    position: fixed;
    left: 0;
    right: 0;
    top: 92px;
    bottom: 88px;
    overflow-y: scroll;
    background-color: #fff;
  }
  .article-detail {
    .article-title {
      font-size: 40px;
      padding: 50px 32px;
      margin: 0;
      color: #3a3a3a;
    }

    .user-info {
      padding: 0 32px;
      .avatar {
        width: 70px;
        height: 70px;
        margin-right: 17px;
      }
      .van-cell__label {
        margin-top: 0;
      }
      .user-name {
        font-size: 24px;
        color: #3a3a3a;
      }
      .publish-date {
        font-size: 23px;
        color: #b7b7b7;
      }
      .follow-btn {
        width: 170px;
        height: 58px;
      }
    }

    .article-content {
      padding: 55px 32px;
      /deep/ p {
        text-align: justify;
      }
    }
  }

  .loading-wrap {
    padding: 200px 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #fff;
  }

  .error-wrap {
    padding: 200px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #fff;
    .van-icon {
      font-size: 122px;
      color: #b4b4b4;
    }
    .text {
      font-size: 30px;
      color: #666666;
      margin: 33px 0 46px;
    }
    .retry-btn {
      width: 280px;
      height: 70px;
      line-height: 70px;
      border: 1px solid #c3c3c3;
      font-size: 30px;
      color: #666666;
    }
  }

  .article-bottom {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-sizing: border-box;
    height: 88px;
    border-top: 1px solid #d8d8d8;
    background-color: #fff;
    .comment-btn {
      width: 282px;
      height: 46px;
      border: 2px solid #eeeeee;
      font-size: 30px;
      line-height: 46px;
      color: #a7a7a7;
    }
    .van-icon {
      font-size: 40px;
      .van-info {
        font-size: 16px;
        background-color: #e22829;
      }
    }
  }
}
</style>
